(i) p Kb of aniline is more than that of methylamine.
(ii) Ethylamine is soluble in water whereas aniline is not.
(i) p Kb of methylamine is lesser than that of aniline :
The electrons accessible on the N – atom are delocalized over the benzene ring when Aniline is under resonance in the above process. As a result, there are less electrons available to donate on the N – atom.
The electron density on the N – atom is improved when considering the situation of methylamine (thanks to the + I impact of the methyl group). As a result, we can see that methylamine has higher basicity than aniline.
As a result, methylamine’s pKb is lower than aniline’s.
(ii) Aniline is not soluble in water while Ethylamine is.
Ethylamine tends to create intermolecular H – bonds with water when it reacts with it.
As a result, it dissolves in water.
Due to the existence of a big hydrophobic -C6H5group, aniline does create H – bonding with water to a high extent. As a result, aniline is insoluble in water.
